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IV
Samsung Business Communications
O
OPX Off Premises Extension
P
PAT Port Address Translation
PBA Printed(circuit) Board Assembly
PCB Printed Circuit Board
PCM Pulse Code Modulation
PCMMC PC-based Man Machine Communication
PLL Phase Locking Loop
POP3 Post Office Protocol version 3
PPP Point to Point Protocol
PPPoE Point to Point Protocol over Ethernet
PRI Primary Rate Interface
PRS Polarity Reverse Detection
PSTN Public Switched Telephone Network
PSU Power Supply Unit
Q
Q-SIG Q-Signalling
QoS Quality of Service
R
RCM R2/CID Module
RIP Routing Information Protocol
RTCP Real-time Transmission Control Protocol
RTP Real-time Transmission Protocol
S
SCM Switch and Conference Module
SCP Signal Control Processor
SDP Session Description Protocol
SG Signalling Gateway
SGCP Simple Gateway Control Protocol
SIGTRAN Signalling Transport
SIO Serial Input/Output
SIP Session Initiation Protocol